Helsingin Yliopisto

Photono Oy

Altum Technologies Oy

Nanoform Finland Oyj

Åbo Akademi Åbo Akademi University

Revenio Research Oy

Edward Hæggström

Ari Salmi

Ivan Kassamakov

Niklas Sandler

Johan Nyman

Anton Nolvi

Tapani Viitala

Heikki Juhani Nieminen

Antti Kontiola

Petri Jukka Myllymäki

Timo Rauhala

Tuomo Ylitalo

Arto Klami

Petri MYLLYMÄKI

Petro Moilanen

Alejandro GARCÍA PÉREZ

Disclosed are methods for cleaning of devices, such as heat exchangers, in particular to methods wherein machine learning systems, such as trained neural networks are used for indicating the fouling status the during the cleaning processes.

Method for cleaning of a device

An intraocular pressure measurement arrangement is disclosed for measuring pressure of an eye of a patient. The arrangement can include at least one source for producing mechanical waves of several frequencies from a distance to the eye of the patient to generate at least one surface wave to the eye, a detector for detecting at least one surface wave from a distance from the eye to extract surface wave information, and a device for determining pressure information of the eye based on the surface wave information.

Method and arrangement for eye pressure measurements

An artifact for determining resolution of imaging based on electromagnetic radiation, mechanical waves, or both is presented. The artifact includes a substrate and layers on top of the substrate. The layers include organic material and are stacked on each other in a partially overlapping way so that an edge of a first one of the layers is arranged to intersect with an edge of a second one of the layers. The layers constitute a three-dimensional surface topography where a groove defined by the edges of the first and second ones of the layers is tapering towards a point of intersection between the edges. The resolution is a minimum width of the tapering groove which is revealed by the imaging so that a pre-determined criterion is fulfilled.

Artifact for determining resolution of imaging based on electromagnetic radiation and/or mechanical waves

A method for calibrating electromagnetic radiation-based three-dimensional imaging includes: obtaining () a calibration imaging result at least partly on the basis of electromagnetic waves received from a calibration artifact, forming () calibration data on the basis of the calibration imaging result and a known thickness profile of the calibration artifact, and correcting (), with the aid of the calibration data, an imaging result obtained at least partly on the basis of electromagnetic waves received from a sample to be imaged. The calibration artifact includes layers, for example Langmuir-Blodgett films, having pre-determined thicknesses and stacked on each other so as to achieve the pre-determined thickness profile of the calibration artifact. A three-dimensional imaging system configured to carry out the method.

Method for calibrating 3D imaging and system for 3D imaging

Growing community of inventors

Helsinki, Finland

Edward Hæggström